[crystaln]

Firebase is really awesome. However there kinds of reliability issues and the lack of integrity and communication with which Google handles such things are major reasons I would avoid committing to it. On top of that, Google's history of overlapping products (Firebase or Firestore?) and discontinuing or foot dragging support make decisions confusing and commitment harrowing.

Amazon on the other hand has a history of committing to clear product direction which makes committing to their platforms much easier. Amplify and AppSync for instance feel like safer choices.

[nslog]

The Amplify and AppSync models are also architecturally more scalable as you don't have one big opaque DB and endpoint in a single region.